18263232 has 140 divisors (see below), whose sum is σ = 58517536. Its totient is φ = 5598720.

The previous prime is 18263209. The next prime is 18263233. The reversal of 18263232 is 23236281.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 18263196 and 18263205.

It is not an unprimeable number, because it can be changed into a prime (18263233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 67257 + ... + 67527.

Almost surely, 2^18263232 is an apocalyptic number.

18263232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18263232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29258768).

18263232 is an abundant number, since it is smaller than the sum of its proper divisors (40254304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18263232 is a wasteful number, since it uses less digits than its factorization.

18263232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308 (or 289 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 18263232 is about 4273.5502805045. The cubic root of 18263232 is about 263.3454860955.

The spelling of 18263232 in words is "eighteen million, two hundred sixty-three thousand, two hundred thirty-two".